html.*

A dictionary of functions creating a specification for a HTML DOM element. Pick html.[lower case tag name] to access function that creates a specification for an element of that tag.
Function gets max two arguments:
1.[optionally] element specification
2.[optionally] children elements specifications in an array or a stream of such arrays.
Each element specification is an object with few fields
Field
Type
Purpose
attrs
{ [attr:string]: string | Observable<string | undefined> }
Attributes dictionary.
Internally using (get|set|remove)Attribute.
props
{
  [prop:string]:
    | any
    | Observable<any>
}
Properties of an DOM element.
Internally using element[prop] to set a value.
events
{
   [event:string]:
    | (event:Event) => any
    | Observer<Event>  
}
Registers a listener for event event. An observer will also receive complete signal upon element removal from DOM.
style
{
  [styleProp]:
    | string
    | Observable<string|undefined>
}
Sets up a style for an element or a subscription of style property values.
ref
(element: HTMLElement) => any
Function is called upon mounting an element to a DOM tree and is provided a reference to that element.
deref
(element: HTMLElement) => any
Function called after the element is removed from the DOM tree. As ref is provided with the element reference.
sync
"immediate" | "self" | "branch"
Should the component updates be confirmed asynchronously using requestAnimationFrame.
immediate - no
self - yes, but only this element
branch - yes, this element and all beneath until specified otherwise
The html.* functions return DOMElement structure that second argument of html.*, svg.* and mount can consist of. Second argument can be composed also from strings which will be responsible of creation Text nodes.
1
html.strong(
2
  { attrs: { class: "importante" } },
3
  ["strings can be children"]
4
);
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However, for performance reasons, as props application is cheaper than structure reconciliation, in case of node that should have single Text node as a child, textContent is preferred.
1
html.strong({
2
  attrs: { class: "importante" },
3
  props: { textContent: "strings can be children" }
4
});
Copied!
For the same reason it would be beneficial in case of dynamic text nodes mixed with some HTML elements should (if possible) be wrapped in spans with textContent pointed to a stream of these texts.

Hullo 👋 DOM - Previous

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svg.*

Last modified 2yr ago

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